Scientists first found dinosaur fossils about 1820. the fossils suggested that dinosaurs were large, slow, reptiles. this view was widely accepted for decades. however, in 1960, scientists began to challenge the idea. more recently, several findings showed that some dinosaurs were closely related to birds, and had active, agile bodies.
which conclusion is best supported by this information?

a) most of the early dinosaur fossils were likely fakes.

b) the earlier ideas of dinosaur fossils were unscientific.

c) scientists have had to revise accepted ideas of dinosaur biology. d) scientists interpreted the available fossil evidence wrongly until 1960.